Available Answers

1. 1.

   Fill in the blanks.

   1.  Rice, wheat, maize and bajra are called _______________.
   2.  ______________ crops are grown in the winter season.
   3.  ______________ soil is the best soil for growing plants.
   4.  Soil is _______________ if it has more OH^- ions.
   5.  Soil acidity can be reduced by adding ______________.
2. 2.

   Fill in the blanks.

   1.  The practice of alternating crops is called _________________.
   2.  _______________ irrigation is used where water is scarce.
   3.  _______________ was the first instrument to be used for harvesting.
   4.  _______________ are chemicals used to kill insects.
   5.  Scattering of seeds by hand is called _______________.
3. 3.

   Tick the most appropriate answer.

   1.  Which of these crops is not a cereal?
      1.  Wheat
      2.  Rice
      3.  Maize
      4.  Pea
   2. Humus content is maximum in this type of soil.
      1.  Laterite soil
      2.  Mountain soil
      3.  Alluvial soil
      4.  Desert Soil
   3.  The process of loosening and turning the soil is called
      1.  Levelling
      2.  Harvesting
      3.  ploughing
      4.  winnowing
   4.  It is a type of irrigation in which water from a canal is allowed into a field.
      1.  Flood irrigation
      2.  Basin irrigation
      3.  Drip irrigation
      4.  Sprinkler irrigation
   5.  Which of these is a mixed (complex) fertilizer?
      1.  Potassium chloride
      2.  Nitrophosphate
      3.  Sodium nitrate
      4.  Superphosphate
   6.  Which of these is a weedicide?
      1.  Superphosphate
      2.  2,4-D
      3.  Urea
      4.  Parathion
   7.  IR-8 is a variety of 
      1.  wheat
      2.  rice
      3.  pulses
      4.  bajra
   8.  Sonalika is a high-yielding variety of
      1.  rice
      2.  wheat
      3.  maize
      4.  bajra
   9.  Which of these machines is used for harvesting and threshing?
      1.  Sickle
      2.  Combine
      3.  Cultivator
      4.  Tractor
   10.  Another name for cross-breeding is
       1.  pollination
       2.  fertilization
       3.  hybridization
       4.  pasteurization
4. 4.

   Fill in the blanks.

   1.  The implement used to turn over and breakup soil is called ________________.
   2.  Allowing a field to remain free of crops for one or more seasons is called ________________.
   3.  The removal of unwanted plants from the field is called _______________.
   4.  The process of separating the grain from the chaff is called _______________.
   5.  Larma, Rojo-64A, Sonalika are some high-yielding varieties of _________________.
5. 5.

   Define agriculture.

6. 6.

   Define irrigation.